Las Vegas, NV

Nevada · Records since 1937–2026

☀️ 103°F
Currently in Las Vegas
As of 11:15 AM PDT
🔥 6° below today's record of 109°F

Records for September 11

🔥 Record High

109°F

September 11, 1945

+12° from 97° normal

❄ Record Low

54°F

September 11, 1952

-20° from 74° normal
🌞 Normal high: 97°F 🌑 Normal low: 74°F 1991–2020 normals

All-Time Records — Las Vegas

🔥
120°F
Hottest Day Ever
Jul 7, 2024
❄
8°F
Coldest Day Ever
Jan 13, 1963
🌧
2.58"
Wettest Day Ever
Aug 21, 1957
☃
7.4"
Most Snow in One Day
Jan 31, 1979

First & Last Dates — Las Vegas

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
331 days
Longest growing season
2009
202 days
Shortest growing season
1945
304 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 109°F September 11, 1945
2 107°F September 11, 1993
3 107°F September 11, 1990
4 107°F September 11, 1948
5 106°F September 11, 1979
6 106°F September 11, 1971
7 106°F September 11, 1944
8 105°F September 11, 1968
9 105°F September 11, 1937
10 104°F September 11, 2015

Top 5 Record Lows — September 11

# Temp Date
🥶 54°F September 11, 1952
2 57°F September 11, 1961
3 57°F September 11, 1942
4 57°F September 11, 1937
5 58°F September 11, 1991
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1937–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Las Vegas

threshold: 110°F (90th percentile of historical Jun–Aug highs)
4.8
Avg heat wave length
days (historical)
114°
Avg peak temp
during heat waves
117
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1937–2026
134
2026 so far
137
Avg/year 1970–2025
142
Avg/year (last 10 complete)
158
Most in a year (1937)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Las Vegas

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 3, 2024 – Jul 13, 2024 11 120°F (Jul 7) 115°F 89°F
2 Jul 14, 2023 – Jul 23, 2023 10 116°F (Jul 16) 113°F 88°F
3 Jun 17, 1961 – Jun 26, 1961 10 113°F (Jun 19) 112°F 79°F
4 Jul 12, 2005 – Jul 20, 2005 9 117°F (Jul 19) 114°F 89°F
5 Jun 17, 2017 – Jun 25, 2017 9 117°F (Jun 20) 113°F 87°F
6 Jun 12, 1940 – Jun 20, 1940 9 116°F (Jun 15) 114°F 69°F
7 Jul 1, 2007 – Jul 9, 2007 9 116°F (Jul 5) 112°F 85°F
8 Jul 21, 2016 – Jul 29, 2016 9 115°F (Jul 27) 112°F 88°F
9 Jul 1, 1942 – Jul 9, 1942 9 114°F (Jul 5) 112°F 72°F
10 Jul 9, 1961 – Jul 17, 1961 9 113°F (Jul 10) 111°F 80°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

74
2026 total
above-normal nights
27.5
Avg / summer
1970–2020
78
Most in a summer
2024

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1937–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1937, annual totals have trended -0.04" per decade, about -0.3" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

This Year — 2026

How Las Vegas is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

173 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

0.69"
2026 YTD
Normal: 2.92"
-2.23"
0.00"
September so far
September normal: 0.32"
-0.32"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Las Vegas is 2.23" behind the normal pace

Period Review — Sep 1 – Nov 30, 2026

Any window, evaluated against every other year on record — 91 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
2026 is still under way for this window — totals and rankings appear once November 30 passes.

Average Temperature by Year — Sep 1 – Nov 30

1937–2025 · 2026 highlighted · trend +0.72° per decade (warming since 1937)

Precipitation by Year — Sep 1 – Nov 30

1937–2025 · 2026 highlighted

About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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